<template>
	<div class="todo-header">
		<input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model="title" @keyup.enter="add"/>
	</div>
</template>

<script>
	//import {nanoid} from "nanoid"
	export default {
		name:"MyHeader",
		data(){
			return {
				title:""
			}
		},
		methods:{
			add(){
				if(!this.title.trim()) return alert("输入不能为空")
				// 将用户的输入包装成为一个todo对象
				const todoObj = {id:Math.random(),title:this.title,done:false} // eslint-disable-line no-unused-vars
				// 通知App组件去添加一个todo对象
				this.$emit("addTodo",todoObj)
				// 清空输入
				this.title = ""
			}
		}
		
	}
</script>

<style scoped="scoped">
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}
</style>
